From: Hans Schultz <netdev@kapio-technology.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: netdev@vger.kernel.org,
Hans Schultz <netdev@kapio-technology.com>,
Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Vladimir Oltean <olteanv@gmail.com>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Jiri Pirko <jiri@resnulli.us>,
Ivan Vecera <ivecera@redhat.com>, Roopa Prabhu <roopa@nvidia.com>,
Nikolay Aleksandrov <razor@blackwall.org>,
Shuah Khan <shuah@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Ido Schimmel <idosch@nvidia.com>,
linux-kernel@vger.kernel.org, bridge@lists.linux-foundation.org,
linux-kselftest@vger.kernel.org
Subject: [PATCH v4 net-next 5/6] net: dsa: mv88e6xxx: mac-auth/MAB implementation
Date: Thu, 7 Jul 2022 17:29:29 +0200 [thread overview]
Message-ID: <20220707152930.1789437-6-netdev@kapio-technology.com> (raw)
In-Reply-To: <20220707152930.1789437-1-netdev@kapio-technology.com>
This implementation for the Marvell mv88e6xxx chip series,
is based on handling ATU miss violations occurring when packets
ingress on a port that is locked. The mac address triggering
the ATU miss violation will be added to the ATU with a zero-DPV,
and is then communicated through switchdev to the bridge module,
which adds a fdb entry with the fdb locked flag set. The entry
is kept according to the bridges ageing time, thus simulating a
dynamic entry.
As this is essentially a form of CPU based learning, the amount
of locked entries will be limited by a hardcoded value for now,
so as to prevent DOS attacks.
Signed-off-by: Hans Schultz <netdev@kapio-technology.com>
---
drivers/net/dsa/mv88e6xxx/Makefile | 1 +
drivers/net/dsa/mv88e6xxx/chip.c | 49 ++++-
drivers/net/dsa/mv88e6xxx/chip.h | 15 ++
drivers/net/dsa/mv88e6xxx/global1.h | 1 +
drivers/net/dsa/mv88e6xxx/global1_atu.c | 16 +-
drivers/net/dsa/mv88e6xxx/port.c | 30 ++-
drivers/net/dsa/mv88e6xxx/port.h | 2 +
drivers/net/dsa/mv88e6xxx/switchdev.c | 280 ++++++++++++++++++++++++
drivers/net/dsa/mv88e6xxx/switchdev.h | 37 ++++
9 files changed, 414 insertions(+), 17 deletions(-)
create mode 100644 drivers/net/dsa/mv88e6xxx/switchdev.c
create mode 100644 drivers/net/dsa/mv88e6xxx/switchdev.h
diff --git a/drivers/net/dsa/mv88e6xxx/Makefile b/drivers/net/dsa/mv88e6xxx/Makefile
index c8eca2b6f959..be903a983780 100644
--- a/drivers/net/dsa/mv88e6xxx/Makefile
+++ b/drivers/net/dsa/mv88e6xxx/Makefile
@@ -15,3 +15,4 @@ mv88e6xxx-objs += port_hidden.o
mv88e6xxx-$(CONFIG_NET_DSA_MV88E6XXX_PTP) += ptp.o
mv88e6xxx-objs += serdes.o
mv88e6xxx-objs += smi.o
+mv88e6xxx-objs += switchdev.o
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index d134153ef023..c1fb7b5ba3ac 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -42,6 +42,7 @@
#include "ptp.h"
#include "serdes.h"
#include "smi.h"
+#include "switchdev.h"
static void assert_reg_lock(struct mv88e6xxx_chip *chip)
{
@@ -919,6 +920,13 @@ static void mv88e6xxx_mac_link_down(struct dsa_switch *ds, int port,
if (err)
dev_err(chip->dev,
"p%d: failed to force MAC link down\n", port);
+ else
+ if (mv88e6xxx_port_is_locked(chip, port)) {
+ err = mv88e6xxx_atu_locked_entry_flush(ds, port);
+ if (err)
+ dev_err(chip->dev,
+ "p%d: failed to clear locked entries\n", port);
+ }
}
static void mv88e6xxx_mac_link_up(struct dsa_switch *ds, int port,
@@ -1685,6 +1693,12 @@ static void mv88e6xxx_port_fast_age(struct dsa_switch *ds, int port)
struct mv88e6xxx_chip *chip = ds->priv;
int err;
+ if (mv88e6xxx_port_is_locked(chip, port))
+ err = mv88e6xxx_atu_locked_entry_flush(ds, port);
+ if (err)
+ dev_err(chip->ds->dev, "p%d: failed to clear locked entries: %d\n",
+ port, err);
+
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_port_fast_age_fid(chip, port, 0);
mv88e6xxx_reg_unlock(chip);
@@ -1721,11 +1735,11 @@ static int mv88e6xxx_vtu_get(struct mv88e6xxx_chip *chip, u16 vid,
return err;
}
-static int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
- int (*cb)(struct mv88e6xxx_chip *chip,
- const struct mv88e6xxx_vtu_entry *entry,
- void *priv),
- void *priv)
+int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
+ int (*cb)(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv),
+ void *priv)
{
struct mv88e6xxx_vtu_entry entry = {
.vid = mv88e6xxx_max_vid(chip),
@@ -2727,6 +2741,9 @@ static int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port,
if (is_locked)
return 0;
+ if (mv88e6xxx_port_is_locked(chip, port))
+ mv88e6xxx_atu_locked_entry_find_purge(ds, port, addr, vid);
+
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid,
MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC);
@@ -2740,12 +2757,17 @@ static int mv88e6xxx_port_fdb_del(struct dsa_switch *ds, int port,
struct dsa_db db)
{
struct mv88e6xxx_chip *chip = ds->priv;
- int err;
+ bool locked_found = false;
+ int err = 0;
- mv88e6xxx_reg_lock(chip);
- err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid, 0);
- mv88e6xxx_reg_unlock(chip);
+ if (mv88e6xxx_port_is_locked(chip, port))
+ locked_found = mv88e6xxx_atu_locked_entry_find_purge(ds, port, addr, vid);
+ if (!locked_found) {
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid, 0);
+ mv88e6xxx_reg_unlock(chip);
+ }
return err;
}
@@ -3814,11 +3836,18 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
static int mv88e6xxx_port_setup(struct dsa_switch *ds, int port)
{
- return mv88e6xxx_setup_devlink_regions_port(ds, port);
+ int err;
+
+ err = mv88e6xxx_setup_devlink_regions_port(ds, port);
+ if (!err)
+ return mv88e6xxx_init_violation_handler(ds, port);
+
+ return err;
}
static void mv88e6xxx_port_teardown(struct dsa_switch *ds, int port)
{
+ mv88e6xxx_teardown_violation_handler(ds, port);
mv88e6xxx_teardown_devlink_regions_port(ds, port);
}
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 5e03cfe50156..3cc2db722ad9 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -280,6 +280,12 @@ struct mv88e6xxx_port {
unsigned int serdes_irq;
char serdes_irq_name[64];
struct devlink_region *region;
+
+ /* List and maintenance of ATU locked entries */
+ struct mutex ale_list_lock;
+ struct list_head ale_list;
+ struct delayed_work ale_work;
+ int ale_cnt;
};
enum mv88e6xxx_region_id {
@@ -399,6 +405,9 @@ struct mv88e6xxx_chip {
int egress_dest_port;
int ingress_dest_port;
+ /* Keep the register written age time for easy access */
+ u8 age_time;
+
/* Per-port timestamping resources. */
struct mv88e6xxx_port_hwtstamp port_hwtstamp[DSA_MAX_PORTS];
@@ -803,6 +812,12 @@ static inline void mv88e6xxx_reg_unlock(struct mv88e6xxx_chip *chip)
mutex_unlock(&chip->reg_lock);
}
+int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
+ int (*cb)(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv),
+ void *priv);
+
int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *bitmap);
#endif /* _MV88E6XXX_CHIP_H */
diff --git a/drivers/net/dsa/mv88e6xxx/global1.h b/drivers/net/dsa/mv88e6xxx/global1.h
index 65958b2a0d3a..503fbf216670 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.h
+++ b/drivers/net/dsa/mv88e6xxx/global1.h
@@ -136,6 +136,7 @@
#define MV88E6XXX_G1_ATU_DATA_TRUNK 0x8000
#define MV88E6XXX_G1_ATU_DATA_TRUNK_ID_MASK 0x00f0
#define MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_MASK 0x3ff0
+#define MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS 0x0000
#define MV88E6XXX_G1_ATU_DATA_STATE_MASK 0x000f
#define MV88E6XXX_G1_ATU_DATA_STATE_UC_UNUSED 0x0000
#define MV88E6XXX_G1_ATU_DATA_STATE_UC_AGE_1_OLDEST 0x0001
diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88e6xxx/global1_atu.c
index 5d120d53823c..d4ca976dac91 100644
--- a/drivers/net/dsa/mv88e6xxx/global1_atu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c
@@ -12,6 +12,8 @@
#include "chip.h"
#include "global1.h"
+#include "port.h"
+#include "switchdev.h"
/* Offset 0x01: ATU FID Register */
@@ -54,6 +56,7 @@ int mv88e6xxx_g1_atu_set_age_time(struct mv88e6xxx_chip *chip,
/* Round to nearest multiple of coeff */
age_time = (msecs + coeff / 2) / coeff;
+ chip->age_time = age_time;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_CTL, &val);
if (err)
@@ -369,6 +372,7 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
int spid;
int err;
u16 val;
+ u16 fid;
mv88e6xxx_reg_lock(chip);
@@ -380,6 +384,10 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
if (err)
goto out;
+ err = mv88e6xxx_g1_read(chip, MV88E6352_G1_ATU_FID, &fid);
+ if (err)
+ goto out;
+
err = mv88e6xxx_g1_atu_data_read(chip, &entry);
if (err)
goto out;
@@ -388,6 +396,8 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
if (err)
goto out;
+ mv88e6xxx_reg_unlock(chip);
+
spid = entry.state;
if (val & MV88E6XXX_G1_ATU_OP_AGE_OUT_VIOLATION) {
@@ -408,6 +418,11 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
"ATU miss violation for %pM portvec %x spid %d\n",
entry.mac, entry.portvec, spid);
chip->ports[spid].atu_miss_violation++;
+ if (fid && mv88e6xxx_port_is_locked(chip, spid))
+ err = mv88e6xxx_handle_violation(chip, spid, &entry, fid,
+ MV88E6XXX_G1_ATU_OP_MISS_VIOLATION);
+ if (err)
+ goto out;
}
if (val & MV88E6XXX_G1_ATU_OP_FULL_VIOLATION) {
@@ -416,7 +431,6 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
entry.mac, entry.portvec, spid);
chip->ports[spid].atu_full_violation++;
}
- mv88e6xxx_reg_unlock(chip);
return IRQ_HANDLED;
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index 795b3128768f..57eb25e9eb63 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -14,9 +14,11 @@
#include <linux/phylink.h>
#include "chip.h"
+#include "global1.h"
#include "global2.h"
#include "port.h"
#include "serdes.h"
+#include "switchdev.h"
int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
u16 *val)
@@ -1239,6 +1241,17 @@ int mv88e6xxx_port_set_mirror(struct mv88e6xxx_chip *chip, int port,
return err;
}
+bool mv88e6xxx_port_is_locked(struct mv88e6xxx_chip *chip, int port)
+{
+ u16 reg;
+
+ mv88e6xxx_reg_lock(chip);
+ mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_CTL0, ®);
+ mv88e6xxx_reg_unlock(chip);
+
+ return reg & MV88E6XXX_PORT_CTL0_SA_FILT_DROP_ON_LOCK;
+}
+
int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
bool locked)
{
@@ -1257,13 +1270,18 @@ int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
if (err)
return err;
- err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, ®);
- if (err)
- return err;
+ if (!locked) {
+ err = mv88e6xxx_atu_locked_entry_flush(chip->ds, port);
+ if (err)
+ return err;
+ }
- reg &= ~MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
- if (locked)
- reg |= MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
+ reg = 0;
+ if (locked) {
+ reg = (1 << port);
+ reg |= MV88E6XXX_PORT_ASSOC_VECTOR_IGNORE_WRONG |
+ MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
+ }
return mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, reg);
}
diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h
index e0a705d82019..5c1d485e7442 100644
--- a/drivers/net/dsa/mv88e6xxx/port.h
+++ b/drivers/net/dsa/mv88e6xxx/port.h
@@ -231,6 +231,7 @@
#define MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT 0x2000
#define MV88E6XXX_PORT_ASSOC_VECTOR_IGNORE_WRONG 0x1000
#define MV88E6XXX_PORT_ASSOC_VECTOR_REFRESH_LOCKED 0x0800
+#define MV88E6XXX_PORT_ASSOC_VECTOR_PAV_MASK 0x07ff
/* Offset 0x0C: Port ATU Control */
#define MV88E6XXX_PORT_ATU_CTL 0x0c
@@ -374,6 +375,7 @@ int mv88e6xxx_port_set_fid(struct mv88e6xxx_chip *chip, int port, u16 fid);
int mv88e6xxx_port_get_pvid(struct mv88e6xxx_chip *chip, int port, u16 *pvid);
int mv88e6xxx_port_set_pvid(struct mv88e6xxx_chip *chip, int port, u16 pvid);
+bool mv88e6xxx_port_is_locked(struct mv88e6xxx_chip *chip, int port);
int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
bool locked);
diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.c b/drivers/net/dsa/mv88e6xxx/switchdev.c
new file mode 100644
index 000000000000..e6c67fb741af
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/switchdev.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * switchdev.c
+ *
+ * Authors:
+ * Hans J. Schultz <hans.schultz@westermo.com>
+ *
+ */
+
+#include <net/switchdev.h>
+#include <linux/list.h>
+#include "chip.h"
+#include "global1.h"
+#include "switchdev.h"
+
+static void mv88e6xxx_atu_locked_entry_purge(struct mv88e6xxx_atu_locked_entry *ale, bool notify)
+{
+ struct switchdev_notifier_fdb_info info = {
+ .addr = ale->mac,
+ .vid = ale->vid,
+ .is_locked = true,
+ .offloaded = true,
+ };
+ struct mv88e6xxx_atu_entry entry;
+ struct net_device *brport;
+ struct dsa_port *dp;
+
+ entry.portvec = MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS;
+ entry.state = MV88E6XXX_G1_ATU_DATA_STATE_UC_UNUSED;
+ entry.trunk = false;
+ ether_addr_copy(entry.mac, ale->mac);
+
+ mv88e6xxx_reg_lock(ale->chip);
+ mv88e6xxx_g1_atu_loadpurge(ale->chip, ale->fid, &entry);
+ mv88e6xxx_reg_unlock(ale->chip);
+
+ dp = dsa_to_port(ale->chip->ds, ale->port);
+
+ if (notify) {
+ rtnl_lock();
+ brport = dsa_port_to_bridge_port(dp);
+
+ if (brport) {
+ call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
+ brport, &info.info, NULL);
+ } else {
+ dev_err(ale->chip->dev, "No bridge port for dsa port belonging to port %d\n",
+ ale->port);
+ }
+ rtnl_unlock();
+ }
+
+ list_del(&ale->list);
+ kfree(ale);
+}
+
+static void mv88e6xxx_atu_locked_entry_cleanup(struct work_struct *work)
+{
+ struct mv88e6xxx_port *p = container_of(work, struct mv88e6xxx_port, ale_work.work);
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ if (time_after(jiffies, ale->expires)) {
+ mv88e6xxx_atu_locked_entry_purge(ale, true);
+ p->ale_cnt--;
+ }
+ }
+ mutex_unlock(&p->ale_list_lock);
+
+ mod_delayed_work(system_long_wq, &p->ale_work, msecs_to_jiffies(100));
+}
+
+static int mv88e6xxx_new_atu_locked_entry(struct mv88e6xxx_chip *chip, const unsigned char *addr,
+ int port, u16 fid, u16 vid,
+ struct mv88e6xxx_atu_locked_entry **alep)
+{
+ struct mv88e6xxx_atu_locked_entry *ale;
+ unsigned long now, age_time;
+
+ ale = kmalloc(sizeof(*ale), GFP_ATOMIC);
+ if (!ale)
+ return -ENOMEM;
+
+ ether_addr_copy(ale->mac, addr);
+ ale->chip = chip;
+ ale->port = port;
+ ale->fid = fid;
+ ale->vid = vid;
+ now = jiffies;
+ age_time = chip->age_time * chip->info->age_time_coeff;
+ ale->expires = now + age_time;
+
+ *alep = ale;
+ return 0;
+}
+
+struct mv88e6xxx_fid_search_ctx {
+ u16 fid_search;
+ u16 vid_found;
+};
+
+static int mv88e6xxx_find_vid_on_matching_fid(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv)
+{
+ struct mv88e6xxx_fid_search_ctx *ctx = priv;
+
+ if (ctx->fid_search == entry->fid) {
+ ctx->vid_found = entry->vid;
+ return 1;
+ }
+
+ return 0;
+}
+
+int mv88e6xxx_handle_violation(struct mv88e6xxx_chip *chip, int port,
+ struct mv88e6xxx_atu_entry *entry,
+ u16 fid, u16 type)
+{
+ struct switchdev_notifier_fdb_info info = {
+ .addr = entry->mac,
+ .vid = 0,
+ .is_locked = true,
+ .offloaded = true,
+ };
+ struct mv88e6xxx_atu_locked_entry *ale;
+ struct mv88e6xxx_fid_search_ctx ctx;
+ struct net_device *brport;
+ struct mv88e6xxx_port *p;
+ struct dsa_port *dp;
+ int err;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ ctx.fid_search = fid;
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_vtu_walk(chip, mv88e6xxx_find_vid_on_matching_fid, &ctx);
+ mv88e6xxx_reg_unlock(chip);
+ if (err < 0)
+ return err;
+ if (err == 1)
+ info.vid = ctx.vid_found;
+ else
+ return -ENODATA;
+
+ switch (type) {
+ case MV88E6XXX_G1_ATU_OP_MISS_VIOLATION:
+ mutex_lock(&p->ale_list_lock);
+ if (p->ale_cnt >= ATU_LOCKED_ENTRIES_MAX)
+ goto exit;
+ mutex_unlock(&p->ale_list_lock);
+ entry->portvec = MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS;
+ entry->state = MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC;
+ entry->trunk = false;
+
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_g1_atu_loadpurge(chip, fid, entry);
+ if (err)
+ goto fail;
+ mv88e6xxx_reg_unlock(chip);
+
+ dp = dsa_to_port(chip->ds, port);
+ err = mv88e6xxx_new_atu_locked_entry(chip, entry->mac, port, fid,
+ info.vid, &ale);
+ if (err)
+ return err;
+
+ mutex_lock(&p->ale_list_lock);
+ list_add(&ale->list, &p->ale_list);
+ p->ale_cnt++;
+ mutex_unlock(&p->ale_list_lock);
+
+ rtnl_lock();
+ brport = dsa_port_to_bridge_port(dp);
+ if (!brport) {
+ rtnl_unlock();
+ return -ENODEV;
+ }
+ err = call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
+ brport, &info.info, NULL);
+ rtnl_unlock();
+ break;
+ }
+
+ return err;
+
+fail:
+ mv88e6xxx_reg_unlock(chip);
+ return err;
+
+exit:
+ mutex_unlock(&p->ale_list_lock);
+ return 0;
+}
+
+bool mv88e6xxx_atu_locked_entry_find_purge(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+{
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+ bool found = false;
+
+ p = &chip->ports[port];
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ if (ether_addr_equal(ale->mac, addr) == 0) {
+ if (ale->vid == vid) {
+ mv88e6xxx_atu_locked_entry_purge(ale, false);
+ p->ale_cnt--;
+ found = true;
+ break;
+ }
+ }
+ }
+ mutex_unlock(&p->ale_list_lock);
+ return found;
+}
+
+int mv88e6xxx_atu_locked_entry_flush(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ mv88e6xxx_atu_locked_entry_purge(ale, false);
+ p->ale_cnt--;
+ }
+ mutex_unlock(&p->ale_list_lock);
+
+ return 0;
+}
+
+int mv88e6xxx_init_violation_handler(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ INIT_LIST_HEAD(&p->ale_list);
+ mutex_init(&p->ale_list_lock);
+ p->ale_cnt = 0;
+ INIT_DELAYED_WORK(&p->ale_work, mv88e6xxx_atu_locked_entry_cleanup);
+ mod_delayed_work(system_long_wq, &p->ale_work, msecs_to_jiffies(500));
+
+ ds->ageing_time_min = 100;
+ return 0;
+}
+
+int mv88e6xxx_teardown_violation_handler(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ cancel_delayed_work(&p->ale_work);
+ mv88e6xxx_atu_locked_entry_flush(ds, port);
+ mutex_destroy(&p->ale_list_lock);
+
+ return 0;
+}
diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.h b/drivers/net/dsa/mv88e6xxx/switchdev.h
new file mode 100644
index 000000000000..df2005c36f47
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/switchdev.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * switchdev.h
+ *
+ * Authors:
+ * Hans J. Schultz <hans.schultz@westermo.com>
+ *
+ */
+
+#ifndef DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_
+#define DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_
+
+#include <net/switchdev.h>
+#include "chip.h"
+
+#define ATU_LOCKED_ENTRIES_MAX 64
+
+struct mv88e6xxx_atu_locked_entry {
+ struct list_head list;
+ struct mv88e6xxx_chip *chip;
+ int port;
+ u8 mac[ETH_ALEN];
+ u16 fid;
+ u16 vid;
+ unsigned long expires;
+};
+
+int mv88e6xxx_handle_violation(struct mv88e6xxx_chip *chip, int port,
+ struct mv88e6xxx_atu_entry *entry,
+ u16 fid, u16 type);
+bool mv88e6xxx_atu_locked_entry_find_purge(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid);
+int mv88e6xxx_atu_locked_entry_flush(struct dsa_switch *ds, int port);
+int mv88e6xxx_init_violation_handler(struct dsa_switch *ds, int port);
+int mv88e6xxx_teardown_violation_handler(struct dsa_switch *ds, int port);
+
+#endif /* DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_ */
--
2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Hans Schultz <netdev@kapio-technology.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: Ivan Vecera <ivecera@redhat.com>, Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
Daniel Borkmann <daniel@iogearbox.net>,
netdev@vger.kernel.org, Nikolay Aleksandrov <razor@blackwall.org>,
Roopa Prabhu <roopa@nvidia.com>,
linux-kernel@vger.kernel.org, Ido Schimmel <idosch@nvidia.com>,
bridge@lists.linux-foundation.org,
Eric Dumazet <edumazet@google.com>,
linux-kselftest@vger.kernel.org,
Hans Schultz <netdev@kapio-technology.com>,
Paolo Abeni <pabeni@redhat.com>,
Vladimir Oltean <olteanv@gmail.com>,
Shuah Khan <shuah@kernel.org>,
Vivien Didelot <vivien.didelot@gmail.com>
Subject: [Bridge] [PATCH v4 net-next 5/6] net: dsa: mv88e6xxx: mac-auth/MAB implementation
Date: Thu, 7 Jul 2022 17:29:29 +0200 [thread overview]
Message-ID: <20220707152930.1789437-6-netdev@kapio-technology.com> (raw)
In-Reply-To: <20220707152930.1789437-1-netdev@kapio-technology.com>
This implementation for the Marvell mv88e6xxx chip series,
is based on handling ATU miss violations occurring when packets
ingress on a port that is locked. The mac address triggering
the ATU miss violation will be added to the ATU with a zero-DPV,
and is then communicated through switchdev to the bridge module,
which adds a fdb entry with the fdb locked flag set. The entry
is kept according to the bridges ageing time, thus simulating a
dynamic entry.
As this is essentially a form of CPU based learning, the amount
of locked entries will be limited by a hardcoded value for now,
so as to prevent DOS attacks.
Signed-off-by: Hans Schultz <netdev@kapio-technology.com>
---
drivers/net/dsa/mv88e6xxx/Makefile | 1 +
drivers/net/dsa/mv88e6xxx/chip.c | 49 ++++-
drivers/net/dsa/mv88e6xxx/chip.h | 15 ++
drivers/net/dsa/mv88e6xxx/global1.h | 1 +
drivers/net/dsa/mv88e6xxx/global1_atu.c | 16 +-
drivers/net/dsa/mv88e6xxx/port.c | 30 ++-
drivers/net/dsa/mv88e6xxx/port.h | 2 +
drivers/net/dsa/mv88e6xxx/switchdev.c | 280 ++++++++++++++++++++++++
drivers/net/dsa/mv88e6xxx/switchdev.h | 37 ++++
9 files changed, 414 insertions(+), 17 deletions(-)
create mode 100644 drivers/net/dsa/mv88e6xxx/switchdev.c
create mode 100644 drivers/net/dsa/mv88e6xxx/switchdev.h
diff --git a/drivers/net/dsa/mv88e6xxx/Makefile b/drivers/net/dsa/mv88e6xxx/Makefile
index c8eca2b6f959..be903a983780 100644
--- a/drivers/net/dsa/mv88e6xxx/Makefile
+++ b/drivers/net/dsa/mv88e6xxx/Makefile
@@ -15,3 +15,4 @@ mv88e6xxx-objs += port_hidden.o
mv88e6xxx-$(CONFIG_NET_DSA_MV88E6XXX_PTP) += ptp.o
mv88e6xxx-objs += serdes.o
mv88e6xxx-objs += smi.o
+mv88e6xxx-objs += switchdev.o
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index d134153ef023..c1fb7b5ba3ac 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -42,6 +42,7 @@
#include "ptp.h"
#include "serdes.h"
#include "smi.h"
+#include "switchdev.h"
static void assert_reg_lock(struct mv88e6xxx_chip *chip)
{
@@ -919,6 +920,13 @@ static void mv88e6xxx_mac_link_down(struct dsa_switch *ds, int port,
if (err)
dev_err(chip->dev,
"p%d: failed to force MAC link down\n", port);
+ else
+ if (mv88e6xxx_port_is_locked(chip, port)) {
+ err = mv88e6xxx_atu_locked_entry_flush(ds, port);
+ if (err)
+ dev_err(chip->dev,
+ "p%d: failed to clear locked entries\n", port);
+ }
}
static void mv88e6xxx_mac_link_up(struct dsa_switch *ds, int port,
@@ -1685,6 +1693,12 @@ static void mv88e6xxx_port_fast_age(struct dsa_switch *ds, int port)
struct mv88e6xxx_chip *chip = ds->priv;
int err;
+ if (mv88e6xxx_port_is_locked(chip, port))
+ err = mv88e6xxx_atu_locked_entry_flush(ds, port);
+ if (err)
+ dev_err(chip->ds->dev, "p%d: failed to clear locked entries: %d\n",
+ port, err);
+
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_port_fast_age_fid(chip, port, 0);
mv88e6xxx_reg_unlock(chip);
@@ -1721,11 +1735,11 @@ static int mv88e6xxx_vtu_get(struct mv88e6xxx_chip *chip, u16 vid,
return err;
}
-static int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
- int (*cb)(struct mv88e6xxx_chip *chip,
- const struct mv88e6xxx_vtu_entry *entry,
- void *priv),
- void *priv)
+int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
+ int (*cb)(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv),
+ void *priv)
{
struct mv88e6xxx_vtu_entry entry = {
.vid = mv88e6xxx_max_vid(chip),
@@ -2727,6 +2741,9 @@ static int mv88e6xxx_port_fdb_add(struct dsa_switch *ds, int port,
if (is_locked)
return 0;
+ if (mv88e6xxx_port_is_locked(chip, port))
+ mv88e6xxx_atu_locked_entry_find_purge(ds, port, addr, vid);
+
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid,
MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC);
@@ -2740,12 +2757,17 @@ static int mv88e6xxx_port_fdb_del(struct dsa_switch *ds, int port,
struct dsa_db db)
{
struct mv88e6xxx_chip *chip = ds->priv;
- int err;
+ bool locked_found = false;
+ int err = 0;
- mv88e6xxx_reg_lock(chip);
- err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid, 0);
- mv88e6xxx_reg_unlock(chip);
+ if (mv88e6xxx_port_is_locked(chip, port))
+ locked_found = mv88e6xxx_atu_locked_entry_find_purge(ds, port, addr, vid);
+ if (!locked_found) {
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_port_db_load_purge(chip, port, addr, vid, 0);
+ mv88e6xxx_reg_unlock(chip);
+ }
return err;
}
@@ -3814,11 +3836,18 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
static int mv88e6xxx_port_setup(struct dsa_switch *ds, int port)
{
- return mv88e6xxx_setup_devlink_regions_port(ds, port);
+ int err;
+
+ err = mv88e6xxx_setup_devlink_regions_port(ds, port);
+ if (!err)
+ return mv88e6xxx_init_violation_handler(ds, port);
+
+ return err;
}
static void mv88e6xxx_port_teardown(struct dsa_switch *ds, int port)
{
+ mv88e6xxx_teardown_violation_handler(ds, port);
mv88e6xxx_teardown_devlink_regions_port(ds, port);
}
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 5e03cfe50156..3cc2db722ad9 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -280,6 +280,12 @@ struct mv88e6xxx_port {
unsigned int serdes_irq;
char serdes_irq_name[64];
struct devlink_region *region;
+
+ /* List and maintenance of ATU locked entries */
+ struct mutex ale_list_lock;
+ struct list_head ale_list;
+ struct delayed_work ale_work;
+ int ale_cnt;
};
enum mv88e6xxx_region_id {
@@ -399,6 +405,9 @@ struct mv88e6xxx_chip {
int egress_dest_port;
int ingress_dest_port;
+ /* Keep the register written age time for easy access */
+ u8 age_time;
+
/* Per-port timestamping resources. */
struct mv88e6xxx_port_hwtstamp port_hwtstamp[DSA_MAX_PORTS];
@@ -803,6 +812,12 @@ static inline void mv88e6xxx_reg_unlock(struct mv88e6xxx_chip *chip)
mutex_unlock(&chip->reg_lock);
}
+int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
+ int (*cb)(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv),
+ void *priv);
+
int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *bitmap);
#endif /* _MV88E6XXX_CHIP_H */
diff --git a/drivers/net/dsa/mv88e6xxx/global1.h b/drivers/net/dsa/mv88e6xxx/global1.h
index 65958b2a0d3a..503fbf216670 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.h
+++ b/drivers/net/dsa/mv88e6xxx/global1.h
@@ -136,6 +136,7 @@
#define MV88E6XXX_G1_ATU_DATA_TRUNK 0x8000
#define MV88E6XXX_G1_ATU_DATA_TRUNK_ID_MASK 0x00f0
#define MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_MASK 0x3ff0
+#define MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS 0x0000
#define MV88E6XXX_G1_ATU_DATA_STATE_MASK 0x000f
#define MV88E6XXX_G1_ATU_DATA_STATE_UC_UNUSED 0x0000
#define MV88E6XXX_G1_ATU_DATA_STATE_UC_AGE_1_OLDEST 0x0001
diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88e6xxx/global1_atu.c
index 5d120d53823c..d4ca976dac91 100644
--- a/drivers/net/dsa/mv88e6xxx/global1_atu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c
@@ -12,6 +12,8 @@
#include "chip.h"
#include "global1.h"
+#include "port.h"
+#include "switchdev.h"
/* Offset 0x01: ATU FID Register */
@@ -54,6 +56,7 @@ int mv88e6xxx_g1_atu_set_age_time(struct mv88e6xxx_chip *chip,
/* Round to nearest multiple of coeff */
age_time = (msecs + coeff / 2) / coeff;
+ chip->age_time = age_time;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_CTL, &val);
if (err)
@@ -369,6 +372,7 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
int spid;
int err;
u16 val;
+ u16 fid;
mv88e6xxx_reg_lock(chip);
@@ -380,6 +384,10 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
if (err)
goto out;
+ err = mv88e6xxx_g1_read(chip, MV88E6352_G1_ATU_FID, &fid);
+ if (err)
+ goto out;
+
err = mv88e6xxx_g1_atu_data_read(chip, &entry);
if (err)
goto out;
@@ -388,6 +396,8 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
if (err)
goto out;
+ mv88e6xxx_reg_unlock(chip);
+
spid = entry.state;
if (val & MV88E6XXX_G1_ATU_OP_AGE_OUT_VIOLATION) {
@@ -408,6 +418,11 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
"ATU miss violation for %pM portvec %x spid %d\n",
entry.mac, entry.portvec, spid);
chip->ports[spid].atu_miss_violation++;
+ if (fid && mv88e6xxx_port_is_locked(chip, spid))
+ err = mv88e6xxx_handle_violation(chip, spid, &entry, fid,
+ MV88E6XXX_G1_ATU_OP_MISS_VIOLATION);
+ if (err)
+ goto out;
}
if (val & MV88E6XXX_G1_ATU_OP_FULL_VIOLATION) {
@@ -416,7 +431,6 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
entry.mac, entry.portvec, spid);
chip->ports[spid].atu_full_violation++;
}
- mv88e6xxx_reg_unlock(chip);
return IRQ_HANDLED;
diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
index 795b3128768f..57eb25e9eb63 100644
--- a/drivers/net/dsa/mv88e6xxx/port.c
+++ b/drivers/net/dsa/mv88e6xxx/port.c
@@ -14,9 +14,11 @@
#include <linux/phylink.h>
#include "chip.h"
+#include "global1.h"
#include "global2.h"
#include "port.h"
#include "serdes.h"
+#include "switchdev.h"
int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
u16 *val)
@@ -1239,6 +1241,17 @@ int mv88e6xxx_port_set_mirror(struct mv88e6xxx_chip *chip, int port,
return err;
}
+bool mv88e6xxx_port_is_locked(struct mv88e6xxx_chip *chip, int port)
+{
+ u16 reg;
+
+ mv88e6xxx_reg_lock(chip);
+ mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_CTL0, ®);
+ mv88e6xxx_reg_unlock(chip);
+
+ return reg & MV88E6XXX_PORT_CTL0_SA_FILT_DROP_ON_LOCK;
+}
+
int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
bool locked)
{
@@ -1257,13 +1270,18 @@ int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
if (err)
return err;
- err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, ®);
- if (err)
- return err;
+ if (!locked) {
+ err = mv88e6xxx_atu_locked_entry_flush(chip->ds, port);
+ if (err)
+ return err;
+ }
- reg &= ~MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
- if (locked)
- reg |= MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
+ reg = 0;
+ if (locked) {
+ reg = (1 << port);
+ reg |= MV88E6XXX_PORT_ASSOC_VECTOR_IGNORE_WRONG |
+ MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
+ }
return mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, reg);
}
diff --git a/drivers/net/dsa/mv88e6xxx/port.h b/drivers/net/dsa/mv88e6xxx/port.h
index e0a705d82019..5c1d485e7442 100644
--- a/drivers/net/dsa/mv88e6xxx/port.h
+++ b/drivers/net/dsa/mv88e6xxx/port.h
@@ -231,6 +231,7 @@
#define MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT 0x2000
#define MV88E6XXX_PORT_ASSOC_VECTOR_IGNORE_WRONG 0x1000
#define MV88E6XXX_PORT_ASSOC_VECTOR_REFRESH_LOCKED 0x0800
+#define MV88E6XXX_PORT_ASSOC_VECTOR_PAV_MASK 0x07ff
/* Offset 0x0C: Port ATU Control */
#define MV88E6XXX_PORT_ATU_CTL 0x0c
@@ -374,6 +375,7 @@ int mv88e6xxx_port_set_fid(struct mv88e6xxx_chip *chip, int port, u16 fid);
int mv88e6xxx_port_get_pvid(struct mv88e6xxx_chip *chip, int port, u16 *pvid);
int mv88e6xxx_port_set_pvid(struct mv88e6xxx_chip *chip, int port, u16 pvid);
+bool mv88e6xxx_port_is_locked(struct mv88e6xxx_chip *chip, int port);
int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
bool locked);
diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.c b/drivers/net/dsa/mv88e6xxx/switchdev.c
new file mode 100644
index 000000000000..e6c67fb741af
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/switchdev.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * switchdev.c
+ *
+ * Authors:
+ * Hans J. Schultz <hans.schultz@westermo.com>
+ *
+ */
+
+#include <net/switchdev.h>
+#include <linux/list.h>
+#include "chip.h"
+#include "global1.h"
+#include "switchdev.h"
+
+static void mv88e6xxx_atu_locked_entry_purge(struct mv88e6xxx_atu_locked_entry *ale, bool notify)
+{
+ struct switchdev_notifier_fdb_info info = {
+ .addr = ale->mac,
+ .vid = ale->vid,
+ .is_locked = true,
+ .offloaded = true,
+ };
+ struct mv88e6xxx_atu_entry entry;
+ struct net_device *brport;
+ struct dsa_port *dp;
+
+ entry.portvec = MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS;
+ entry.state = MV88E6XXX_G1_ATU_DATA_STATE_UC_UNUSED;
+ entry.trunk = false;
+ ether_addr_copy(entry.mac, ale->mac);
+
+ mv88e6xxx_reg_lock(ale->chip);
+ mv88e6xxx_g1_atu_loadpurge(ale->chip, ale->fid, &entry);
+ mv88e6xxx_reg_unlock(ale->chip);
+
+ dp = dsa_to_port(ale->chip->ds, ale->port);
+
+ if (notify) {
+ rtnl_lock();
+ brport = dsa_port_to_bridge_port(dp);
+
+ if (brport) {
+ call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
+ brport, &info.info, NULL);
+ } else {
+ dev_err(ale->chip->dev, "No bridge port for dsa port belonging to port %d\n",
+ ale->port);
+ }
+ rtnl_unlock();
+ }
+
+ list_del(&ale->list);
+ kfree(ale);
+}
+
+static void mv88e6xxx_atu_locked_entry_cleanup(struct work_struct *work)
+{
+ struct mv88e6xxx_port *p = container_of(work, struct mv88e6xxx_port, ale_work.work);
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ if (time_after(jiffies, ale->expires)) {
+ mv88e6xxx_atu_locked_entry_purge(ale, true);
+ p->ale_cnt--;
+ }
+ }
+ mutex_unlock(&p->ale_list_lock);
+
+ mod_delayed_work(system_long_wq, &p->ale_work, msecs_to_jiffies(100));
+}
+
+static int mv88e6xxx_new_atu_locked_entry(struct mv88e6xxx_chip *chip, const unsigned char *addr,
+ int port, u16 fid, u16 vid,
+ struct mv88e6xxx_atu_locked_entry **alep)
+{
+ struct mv88e6xxx_atu_locked_entry *ale;
+ unsigned long now, age_time;
+
+ ale = kmalloc(sizeof(*ale), GFP_ATOMIC);
+ if (!ale)
+ return -ENOMEM;
+
+ ether_addr_copy(ale->mac, addr);
+ ale->chip = chip;
+ ale->port = port;
+ ale->fid = fid;
+ ale->vid = vid;
+ now = jiffies;
+ age_time = chip->age_time * chip->info->age_time_coeff;
+ ale->expires = now + age_time;
+
+ *alep = ale;
+ return 0;
+}
+
+struct mv88e6xxx_fid_search_ctx {
+ u16 fid_search;
+ u16 vid_found;
+};
+
+static int mv88e6xxx_find_vid_on_matching_fid(struct mv88e6xxx_chip *chip,
+ const struct mv88e6xxx_vtu_entry *entry,
+ void *priv)
+{
+ struct mv88e6xxx_fid_search_ctx *ctx = priv;
+
+ if (ctx->fid_search == entry->fid) {
+ ctx->vid_found = entry->vid;
+ return 1;
+ }
+
+ return 0;
+}
+
+int mv88e6xxx_handle_violation(struct mv88e6xxx_chip *chip, int port,
+ struct mv88e6xxx_atu_entry *entry,
+ u16 fid, u16 type)
+{
+ struct switchdev_notifier_fdb_info info = {
+ .addr = entry->mac,
+ .vid = 0,
+ .is_locked = true,
+ .offloaded = true,
+ };
+ struct mv88e6xxx_atu_locked_entry *ale;
+ struct mv88e6xxx_fid_search_ctx ctx;
+ struct net_device *brport;
+ struct mv88e6xxx_port *p;
+ struct dsa_port *dp;
+ int err;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ ctx.fid_search = fid;
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_vtu_walk(chip, mv88e6xxx_find_vid_on_matching_fid, &ctx);
+ mv88e6xxx_reg_unlock(chip);
+ if (err < 0)
+ return err;
+ if (err == 1)
+ info.vid = ctx.vid_found;
+ else
+ return -ENODATA;
+
+ switch (type) {
+ case MV88E6XXX_G1_ATU_OP_MISS_VIOLATION:
+ mutex_lock(&p->ale_list_lock);
+ if (p->ale_cnt >= ATU_LOCKED_ENTRIES_MAX)
+ goto exit;
+ mutex_unlock(&p->ale_list_lock);
+ entry->portvec = MV88E6XXX_G1_ATU_DATA_PORT_VECTOR_NO_EGRESS;
+ entry->state = MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC;
+ entry->trunk = false;
+
+ mv88e6xxx_reg_lock(chip);
+ err = mv88e6xxx_g1_atu_loadpurge(chip, fid, entry);
+ if (err)
+ goto fail;
+ mv88e6xxx_reg_unlock(chip);
+
+ dp = dsa_to_port(chip->ds, port);
+ err = mv88e6xxx_new_atu_locked_entry(chip, entry->mac, port, fid,
+ info.vid, &ale);
+ if (err)
+ return err;
+
+ mutex_lock(&p->ale_list_lock);
+ list_add(&ale->list, &p->ale_list);
+ p->ale_cnt++;
+ mutex_unlock(&p->ale_list_lock);
+
+ rtnl_lock();
+ brport = dsa_port_to_bridge_port(dp);
+ if (!brport) {
+ rtnl_unlock();
+ return -ENODEV;
+ }
+ err = call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
+ brport, &info.info, NULL);
+ rtnl_unlock();
+ break;
+ }
+
+ return err;
+
+fail:
+ mv88e6xxx_reg_unlock(chip);
+ return err;
+
+exit:
+ mutex_unlock(&p->ale_list_lock);
+ return 0;
+}
+
+bool mv88e6xxx_atu_locked_entry_find_purge(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid)
+{
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+ bool found = false;
+
+ p = &chip->ports[port];
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ if (ether_addr_equal(ale->mac, addr) == 0) {
+ if (ale->vid == vid) {
+ mv88e6xxx_atu_locked_entry_purge(ale, false);
+ p->ale_cnt--;
+ found = true;
+ break;
+ }
+ }
+ }
+ mutex_unlock(&p->ale_list_lock);
+ return found;
+}
+
+int mv88e6xxx_atu_locked_entry_flush(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_atu_locked_entry *ale, *tmp;
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ mutex_lock(&p->ale_list_lock);
+ list_for_each_entry_safe(ale, tmp, &p->ale_list, list) {
+ mv88e6xxx_atu_locked_entry_purge(ale, false);
+ p->ale_cnt--;
+ }
+ mutex_unlock(&p->ale_list_lock);
+
+ return 0;
+}
+
+int mv88e6xxx_init_violation_handler(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ INIT_LIST_HEAD(&p->ale_list);
+ mutex_init(&p->ale_list_lock);
+ p->ale_cnt = 0;
+ INIT_DELAYED_WORK(&p->ale_work, mv88e6xxx_atu_locked_entry_cleanup);
+ mod_delayed_work(system_long_wq, &p->ale_work, msecs_to_jiffies(500));
+
+ ds->ageing_time_min = 100;
+ return 0;
+}
+
+int mv88e6xxx_teardown_violation_handler(struct dsa_switch *ds, int port)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_port *p;
+
+ if (!mv88e6xxx_is_invalid_port(chip, port))
+ p = &chip->ports[port];
+ else
+ return -ENODEV;
+
+ cancel_delayed_work(&p->ale_work);
+ mv88e6xxx_atu_locked_entry_flush(ds, port);
+ mutex_destroy(&p->ale_list_lock);
+
+ return 0;
+}
diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.h b/drivers/net/dsa/mv88e6xxx/switchdev.h
new file mode 100644
index 000000000000..df2005c36f47
--- /dev/null
+++ b/drivers/net/dsa/mv88e6xxx/switchdev.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * switchdev.h
+ *
+ * Authors:
+ * Hans J. Schultz <hans.schultz@westermo.com>
+ *
+ */
+
+#ifndef DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_
+#define DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_
+
+#include <net/switchdev.h>
+#include "chip.h"
+
+#define ATU_LOCKED_ENTRIES_MAX 64
+
+struct mv88e6xxx_atu_locked_entry {
+ struct list_head list;
+ struct mv88e6xxx_chip *chip;
+ int port;
+ u8 mac[ETH_ALEN];
+ u16 fid;
+ u16 vid;
+ unsigned long expires;
+};
+
+int mv88e6xxx_handle_violation(struct mv88e6xxx_chip *chip, int port,
+ struct mv88e6xxx_atu_entry *entry,
+ u16 fid, u16 type);
+bool mv88e6xxx_atu_locked_entry_find_purge(struct dsa_switch *ds, int port,
+ const unsigned char *addr, u16 vid);
+int mv88e6xxx_atu_locked_entry_flush(struct dsa_switch *ds, int port);
+int mv88e6xxx_init_violation_handler(struct dsa_switch *ds, int port);
+int mv88e6xxx_teardown_violation_handler(struct dsa_switch *ds, int port);
+
+#endif /* DRIVERS_NET_DSA_MV88E6XXX_SWITCHDEV_H_ */
--
2.30.2
next prev parent reply other threads:[~2022-07-07 15:30 UTC|newest]
Thread overview: 115+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-07 15:29 [PATCH v4 net-next 0/6] Extend locked port feature with FDB locked flag (MAC-Auth/MAB) Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-07 15:29 ` [PATCH v4 net-next 1/6] net: bridge: add locked entry fdb flag to extend locked port feature Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-10 8:20 ` Ido Schimmel
2022-07-10 8:20 ` [Bridge] " Ido Schimmel
2022-07-07 15:29 ` [PATCH v4 net-next 2/6] net: switchdev: add support for offloading of fdb locked flag Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-08 8:54 ` Vladimir Oltean
2022-07-08 8:54 ` [Bridge] " Vladimir Oltean
2022-08-02 8:27 ` netdev
2022-08-02 8:27 ` [Bridge] " netdev
2022-08-02 10:13 ` netdev
2022-08-02 10:13 ` [Bridge] " netdev
2022-07-07 15:29 ` [PATCH v4 net-next 3/6] drivers: net: dsa: add locked fdb entry flag to drivers Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-08 7:12 ` kernel test robot
2022-07-08 8:49 ` Vladimir Oltean
2022-07-08 8:49 ` [Bridge] " Vladimir Oltean
2022-07-08 9:06 ` netdev
2022-07-08 9:06 ` [Bridge] " netdev
2022-07-08 9:15 ` Vladimir Oltean
2022-07-08 9:15 ` [Bridge] " Vladimir Oltean
2022-07-08 9:27 ` netdev
2022-07-08 9:27 ` [Bridge] " netdev
2022-07-08 9:50 ` netdev
2022-07-08 9:50 ` [Bridge] " netdev
2022-07-08 11:56 ` Vladimir Oltean
2022-07-08 11:56 ` [Bridge] " Vladimir Oltean
2022-07-08 12:34 ` netdev
2022-07-08 12:34 ` [Bridge] " netdev
2022-07-10 8:35 ` Ido Schimmel
2022-07-10 8:35 ` [Bridge] " Ido Schimmel
2022-07-13 7:09 ` netdev
2022-07-13 7:09 ` [Bridge] " netdev
2022-07-13 12:39 ` Ido Schimmel
2022-07-13 12:39 ` [Bridge] " Ido Schimmel
2022-07-17 12:21 ` netdev
2022-07-17 12:21 ` [Bridge] " netdev
2022-07-17 12:57 ` Vladimir Oltean
2022-07-17 12:57 ` [Bridge] " Vladimir Oltean
2022-07-17 13:09 ` netdev
2022-07-17 13:09 ` [Bridge] " netdev
2022-07-17 13:59 ` Vladimir Oltean
2022-07-17 13:59 ` [Bridge] " Vladimir Oltean
2022-07-17 14:57 ` netdev
2022-07-17 14:57 ` [Bridge] " netdev
2022-07-17 15:08 ` Vladimir Oltean
2022-07-17 15:08 ` [Bridge] " Vladimir Oltean
2022-07-17 16:10 ` netdev
2022-07-17 16:10 ` [Bridge] " netdev
2022-07-21 11:54 ` Vladimir Oltean
2022-07-21 11:54 ` [Bridge] " Vladimir Oltean
2022-07-17 15:20 ` Ido Schimmel
2022-07-17 15:20 ` [Bridge] " Ido Schimmel
2022-07-17 15:53 ` netdev
2022-07-17 15:53 ` [Bridge] " netdev
2022-07-21 11:59 ` Vladimir Oltean
2022-07-21 11:59 ` [Bridge] " Vladimir Oltean
2022-07-21 13:27 ` Ido Schimmel
2022-07-21 13:27 ` [Bridge] " Ido Schimmel
2022-07-21 14:20 ` Vladimir Oltean
2022-07-21 14:20 ` [Bridge] " Vladimir Oltean
2022-07-24 11:10 ` Ido Schimmel
2022-07-24 11:10 ` [Bridge] " Ido Schimmel
2022-08-01 11:57 ` netdev
2022-08-01 11:57 ` [Bridge] " netdev
2022-08-01 13:14 ` netdev
2022-08-01 13:14 ` [Bridge] " netdev
2022-08-02 12:54 ` netdev
2022-08-02 12:54 ` [Bridge] " netdev
2022-08-01 15:33 ` netdev
2022-08-01 15:33 ` [Bridge] " netdev
2022-08-09 9:20 ` Ido Schimmel
2022-08-09 9:20 ` [Bridge] " Ido Schimmel
2022-08-09 20:00 ` netdev
2022-08-09 20:00 ` [Bridge] " netdev
2022-08-10 7:21 ` Ido Schimmel
2022-08-10 7:21 ` [Bridge] " Ido Schimmel
2022-08-10 8:40 ` netdev
2022-08-10 8:40 ` [Bridge] " netdev
2022-08-11 11:28 ` Ido Schimmel
2022-08-11 11:28 ` [Bridge] " Ido Schimmel
2022-08-12 15:33 ` netdev
2022-08-12 15:33 ` [Bridge] " netdev
2022-08-16 7:51 ` netdev
2022-08-16 7:51 ` [Bridge] " netdev
2022-08-17 6:21 ` Ido Schimmel
2022-08-17 6:21 ` [Bridge] " Ido Schimmel
2022-07-21 11:51 ` Vladimir Oltean
2022-07-21 11:51 ` [Bridge] " Vladimir Oltean
2022-07-08 20:39 ` kernel test robot
2022-07-07 15:29 ` [PATCH v4 net-next 4/6] net: dsa: mv88e6xxx: allow reading FID when handling ATU violations Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-07 15:29 ` Hans Schultz [this message]
2022-07-07 15:29 ` [Bridge] [PATCH v4 net-next 5/6] net: dsa: mv88e6xxx: mac-auth/MAB implementation Hans Schultz
2022-07-08 9:46 ` kernel test robot
2022-07-17 0:47 ` Vladimir Oltean
2022-07-17 0:47 ` [Bridge] " Vladimir Oltean
2022-07-17 12:34 ` netdev
2022-07-17 12:34 ` [Bridge] " netdev
2022-07-21 12:04 ` Vladimir Oltean
2022-07-21 12:04 ` [Bridge] " Vladimir Oltean
2022-08-19 8:28 ` netdev
2022-08-19 8:28 ` [Bridge] " netdev
2022-07-07 15:29 ` [PATCH v4 net-next 6/6] selftests: forwarding: add test of MAC-Auth Bypass to locked port tests Hans Schultz
2022-07-07 15:29 ` [Bridge] " Hans Schultz
2022-07-10 7:29 ` Ido Schimmel
2022-07-10 7:29 ` [Bridge] " Ido Schimmel
2022-07-12 12:28 ` netdev
2022-07-12 12:28 ` [Bridge] " netdev
2022-07-08 1:00 ` [PATCH v4 net-next 0/6] Extend locked port feature with FDB locked flag (MAC-Auth/MAB) Jakub Kicinski
2022-07-08 1:00 ` [Bridge] " Jakub Kicinski
2022-08-11 5:09 ` Benjamin Poirier
2022-08-11 5:09 ` [Bridge] " Benjamin Poirier
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